Distance-measuring device.



R. A. WILSON.

DISTANCE MEASURING DEVICE.

APPLICATION FILED JUNE 8.1914.

1,14,675., Patented June 29, 1915.

' INVENTOR. HA. Wilson.

A TTOR NE Y.

WITNESSES:

1N5 NORRIS PETERS c0 PHOTO LITHQ, WASHINGTON D. C.

RADCLIFF A. WILSON, OF SAN FRANCISCO, CALIFORNIA.

DISTANCE-MEASURING DEVICE.

iaa'eva Specification of Letters Patent.

Patented June 29, 1915.

Application filed June 8, 1914. Serial No. 843,687.

To all whom it may concern:

Be it known that I, RADCLIFF A. VVILsoN. a citizen of the United States,residing at San Francisco, in the county of San Francisco, State ofCalifornia, have invented a new and useful Distance-Measuring Device, ofwhich the following is a specification, in such full and clear terms aswill enable those skilled in the art to construct and use-the same.

This invention relates to a device for determining the distance of anobject from the observer to enable camera users to accurately focus uponthe object to be photographed thereby producing better pictures thanwould be the case if the proper focus is not obtained.

An embodiment of the invention is shown in the drawing in which the samereference numeral is applied to the same portion throughout, but I amaware that there are many modifications thereof.

Figure 1 is a side elevation of a camera having this device appliedthereto, F ig. 2 is an edge elevation of the camera and the device as itappears to the observer in taking a sight, Fig. 3 is a perspective viewof the camera and distance finder indicating the way the camera isturned over to examine the sight after taking the same, and Fig. 4 is aplan view of the device separate from. the camera.

The numeral 1 represents the camera box, 2 indicating an adjustingdevice for setting the lens to the proper focus.

The sighting device comprises a sector plate 3 having projectingbrackets 4 and 5 at the bottom for securing the device to the camerabox. At the top the plate 3 has two brackets 6 and 7 for securing theupper end of the device to the box 1, and also for pro viding a sight 8and notch 9, through which latter the object to be photographed is to beobserved. The plate 3 is held away from the camera box slightly morethan the thick-' ness of the pendulum 10, which latter is pivoted to theplate 3 at 11 and which has a weight 12 at its lower end. The lower endof the pendulum projects out from under the plate 3 far enough to enablethe operator to observe the position thereof when desired, the outsideof the plate having the marks 6l2152550-100, etc., thereon to indicatethe distance. It will be observed that the three holes in the brackets6, 7 and 4 are on lines at right angles to each other, the object ofwhich is to enable the user to correctly install the device on thecamera.

In use the person using the camera holds the sight one foot from his eyeand sights at a point as nearly as possible on a level with his feet, atthe base of the object, the average height of persons giving a base linefor the determination or" the measurement. When the sight has been madethe camera is carefully turned over on its side as in Fig. 3 and thependulum will be set at the proper distance mark, whereupon the cameramay be set to the proper focus in the usual way.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States, is as follows,modifications within the scope of the claim being expressly reserved:

A distance measuring device for cameras comprising a plate provided witha distance scale, brackets for securing said plate to the side of acamera, two of said brackets. and a pendulum pivoted to the plate andhaving one end movable across said distance scale.

In testimony whereof I have hereunto set my hand this 29th day of May A.D. 1914, in the presence of the two subscribed wit nesses.

RADCLIFF A. WILSON. Witnesses:

C. P. GRDE'FIN, HENRY B. LISTER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

sights carried by

